Popa, V., and A.-M. Patriciu. “GENERAL FIXED POINT THEOREMS FOR PAIRS OF EXPANSIVE MAPPINGS WITH COMMON LIMIT RANGE PROPERTY IN $G$ - METRIC SPACES”. Journal of Nonlinear Analysis and Optimization: Theory & Applications (JNAO) 7, no. 2 (February 1, 2018): 105–114. accessed September 2, 2026. https://ph03.tci-thaijo.org/index.php/jnao/article/view/2837.